Re: A82: Greyscale Mentioned?


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Re: A82: Greyscale Mentioned?




In a message dated 7/28/99 1:34:19 AM Eastern Daylight Time, Jkhum98@aol.com 
writes:

> Ive read that ADAMMAN is using Greyscale for Defiance, and Jeremy is using 
it 
> 
>  for AgentX... Would y'all mind posting any source code you have on that?  
I 

Jeremy posted his source on his website.  Though I haven't really looked at 
the source, I tried out his test programs and it seems to be better quality 
grayscale than mine.  Sometime I will probably analyze it and see what the 
differences are, but I'm pretty sure we both use interrupt speed to vary the 
quality of the grayscale.

>  would assume the greyscale interrupt technique is very similar to what the 
> 83 
>  can do, and I have been experimenting alot with greyscale for the past 
week, 
> 
>  and a month ago before this, yet I cant get it to be of any good 
quality... 
> I 
>  got perfect greyscale on VTI, but that means nothing since it doesnt 
Emulate 
> 
>  the hardware in any similar way... Please inform me about any new 
techniques 
> 
>  there are... :)
>  
>  Jason_K

I basically ported the interrupt stuff from the 85, and used a routine given 
to me by Dines to put the images on the LCD.  It's not the fastest routine, 
but it seemed to give better results than faster routines.  Then so the 
grayscale doesn't look like crap, you need to use port 4 to change the 
interrupt speeds...unfortunately the quality that different speeds give seems 
to vary greatly on each calc, and of course battery power is a major factor.  
Grayscale on the 82 is extremely sensitive to any changes that are made.
I haven't even attempted to implement it into Defiance yet, and I hope and 
pray that it will work well.

~Adamman


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